#!/bin/bash
set -euo pipefail

RCON="docker exec mc rcon-cli"
BACKUP_DIR="/opt/mc-backups"
DATE=$(date +%Y-%m-%d_%H-%M)
KEEP_DAYS=7

mkdir -p "$BACKUP_DIR"

echo "[$(date)] Starting backup..."

# Pause world saving to ensure consistent snapshot
$RCON 'save-off'
$RCON 'save-all flush'
sleep 5

# Create archive
tar -czf "$BACKUP_DIR/backup_$DATE.tar.gz" /opt/minecraft/data/ \
  --exclude='data/resurse'   # resource world excluded — resets anyway

# Resume saving
$RCON 'save-on'

# Cleanup old backups
find "$BACKUP_DIR" -name "backup_*.tar.gz" -mtime +$KEEP_DAYS -delete

SIZE=$(du -sh "$BACKUP_DIR/backup_$DATE.tar.gz" | cut -f1)
echo "[$(date)] Backup complete: backup_$DATE.tar.gz ($SIZE)"

# Crontab entry
0 4 * * * /opt/minecraft/scripts/backup.sh >> /var/log/mc-backup.log 2>&1

TRIGGER: Container stops unexpectedly / players can't connect

1. docker compose ps
   → Check if mc container is running

2. docker compose logs mc --tail=50
   → Find ERROR or Exception — identify cause

3. df -h
   → Check disk isn't full

4. free -h
   → Check RAM (OOM kill?)

5. If OOM: increase MEMORY in .env → docker compose up -d

6. If plugin error: identify plugin name in logs
   → Rename data/plugins/ProblemPlugin.jar → ProblemPlugin.jar.disabled
   → docker compose restart mc

7. If startup fails completely:
   → docker compose down
   → mv data/plugins data/plugins_disabled
   → docker compose up -d (bare server)
   → Re-enable plugins one by one

8. If downtime > 5 minutes: post in Discord #alerts

TRIGGER: Player reports blocks were destroyed/stolen

1. /co inspect
   → Click affected blocks to see who placed/broke them

2. /co lookup u:SuspectName t:24h
   → Review full activity log

3. Confirm it's grief (not accidental damage)

4. /co rollback u:SuspectName t:2h r:30
   → Rollback grief (2h window, 30-block radius)

5. Verify rollback visually

6. Take action:
   → First offense: /warn SuspectName Grief
   → Repeat offense: /tempban SuspectName 7d Grief repetat
   → Severe: /ban SuspectName Grief sever

7. Post in Discord #staff-log:
   "Grief by [Name] at [coords], rollback done, action: [warn/ban]"

TRIGGER: World corruption / accidental mass deletion

1. List available backups:
   ls -lht /opt/mc-backups/

2. Stop server:
   docker compose down

3. Save current state (safety copy):
   mv ./data ./data_pre_restore_$(date +%Y%m%d)

4. Extract backup:
   tar -xzf /opt/mc-backups/backup_TARGET_DATE.tar.gz -C /opt/minecraft/

5. Start server:
   docker compose up -d

6. Verify:
   docker compose logs -f mc
   → Wait for "Done!" message
   → Log in and inspect previously affected areas

7. If restore failed → revert:
   docker compose down
   mv data_pre_restore_DATE data
   docker compose up -d

8. Delete safety copy after 48h if all is stable:
   rm -rf ./data_pre_restore_DATE

TRIGGER: TPS drops below 15

1. Check TPS:
   docker exec mc rcon-cli tps

2. Check resources:
   docker stats mc --no-stream

3. If RAM > 85%:
   → Increase MEMORY in .env
   → docker compose restart mc

4. If CPU pegged:
   → Reduce view-distance immediately:
   docker exec mc rcon-cli "view-distance 6"
   → Check entity count: /paper entity

5. If no improvement in 5 minutes:
   docker compose restart mc

6. Post in Discord #alerts if players affected

# Run manually at season end
mkdir -p /opt/mc-archives

# Create season archive
tar -czf /opt/mc-archives/season1_$(date +%Y%m%d).tar.gz \
  /opt/minecraft/data/

echo "Season 1 archived: $(du -sh /opt/mc-archives/season1_*.tar.gz)"

# Clean data for Season 2
docker compose down
rm -rf /opt/minecraft/data/
docker compose up -d